bundles/org.simantics.event/src/org/simantics/event/EventSupport.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2012 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     Semantum Oy - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.event;\r
  13 \r
  14 import java.util.UUID;\r
  15 \r
  16 import org.simantics.databoard.Bindings;\r
  17 import org.simantics.db.Resource;\r
  18 import org.simantics.db.WriteGraph;\r
  19 import org.simantics.db.common.request.WriteRequest;\r
  20 import org.simantics.db.exception.DatabaseException;\r
  21 import org.simantics.db.service.VirtualGraphSupport;\r
  22 import org.simantics.event.ontology.EventResource;\r
  23 import org.simantics.event.writer.EventSourceResolver;\r
  24 import org.simantics.event.writer.EventWriteTask;\r
  25 import org.simantics.event.writer.EventWriterJob;\r
  26 import org.simantics.layer0.Layer0;\r
  27 \r
  28 /**\r
  29  * @author Tuukka Lehtonen\r
  30  */\r
  31 public class EventSupport {\r
  32 \r
  33     private Resource model;\r
  34     private Resource run;\r
  35     private EventSourceResolver.Filter filter;\r
  36 \r
  37     @SuppressWarnings("unused")\r
  38     private Resource eventLog;\r
  39 \r
  40     private EventWriterJob writer;\r
  41     private EventSourceResolver resolver;\r
  42 \r
  43     public EventSupport(Resource model, Resource run, EventSourceResolver.Filter filter) {\r
  44         this.model = model;\r
  45         this.run = run;\r
  46         this.filter = filter;\r
  47     }\r
  48 \r
  49     public Resource initialize(WriteGraph graph) throws DatabaseException {\r
  50         Layer0 L0 = Layer0.getInstance(graph);\r
  51         final EventResource EVENT = EventResource.getInstance(graph);\r
  52 \r
  53         Resource log = graph.newResource();\r
  54         this.eventLog = log;\r
  55         graph.claim(log, L0.InstanceOf, null, EVENT.EventLog);\r
  56         graph.claimLiteral(log, L0.HasName, UUID.randomUUID().toString(), Bindings.STRING);\r
  57         graph.claim(model, EVENT.HasEventLog, log);\r
  58         graph.claim(model, L0.ConsistsOf, log);\r
  59 \r
  60         // Switch write to graph of run resource\r
  61         final Resource _log = log;\r
  62         VirtualGraphSupport support = graph.getService(VirtualGraphSupport.class);\r
  63         graph.syncRequest(new WriteRequest( support.getGraph(graph, run) ) {\r
  64             @Override\r
  65             public void perform(WriteGraph graph) throws DatabaseException {\r
  66                 graph.claim(_log, EVENT.HasEventProducer, run);\r
  67             }\r
  68         });\r
  69 \r
  70         // Start event writer & resolver services\r
  71         this.resolver = new EventSourceResolver(graph.getProvider(), log, filter);\r
  72         this.writer = new EventWriterJob(graph.getProvider(), log, this.resolver);\r
  73         this.resolver.schedule();\r
  74 \r
  75         return log;\r
  76     }\r
  77 \r
  78     public void queue(EventWriteTask task) {\r
  79         EventWriterJob w = writer;\r
  80         if (w != null)\r
  81             w.queue(task);\r
  82     }\r
  83 \r
  84     public void dispose() {\r
  85         if (writer != null) {\r
  86             writer.dispose();\r
  87             writer = null;\r
  88         }\r
  89         if (resolver != null) {\r
  90             resolver.dispose();\r
  91             resolver = null;\r
  92         }\r
  93     }\r
  94 \r
  95 }\r